A. Heuser and A. Eisenhauer (2010) A Pilot Study on the Use of Natural Calcium Isotope (44Ca/40Ca) Fractionation in Urine as a Proxy for the Human Body Calcium Balance. Bone46, 889−896 doi: 10.1016/j.bone.2009.11.037

A. Heuser and A. Eisenhauer (2007) From isotope geochemistry to isotope biochemistry: A case study on the use of Calcium isotopes in human urine as an indicator of bone demineralization. EGU Meeting 2007, Vienna